3.5 90 Deg Long Radius Elbow

The 3.5 90 Deg Long Radius Elbow by Boyce is a critical component in exhaust system design, engineered for builders and mechanics who demand smooth airflow and minimal turbulence through their intake or exhaust manifold transitions. This fitting bridges the gap between straight pipe runs at a 90-degree angle while maintaining the gradual bend geometry that long-radius elbows provide, making it essential for custom engine builds, turbo installations, and performance exhaust upgrades. Whether you're fabricating a cold-air intake, routing exhaust tubing on a tight engine bay, or optimizing flow characteristics in a competition vehicle, this elbow ensures your system breathes without the restriction or heat stress that sharp-bend fittings introduce.

Long-radius elbows work by gradually transitioning flow direction across a larger arc than standard 90-degree fittings, reducing pressure drop and turbulence that can rob horsepower and create hot spots in your system. The 3.5-inch nominal diameter accommodates substantial airflow volumes common in V8 and larger turbocharged applications, while the extended length and gentle curve minimize the velocity losses you'd encounter with conventional short-radius bends. Built to Boyce's engineering standards, this fitting integrates seamlessly into custom fabrication work where precision tubing and mandrel-bent piping demand quality elbows that won't collapse under exhaust heat or boost pressure.

Mechanics and engine builders rely on the 3.5 90 Deg Long Radius Elbow for applications ranging from custom exhaust manifold work to turbocharger discharge piping and intake manifold fabrication on high-performance street and race engines. Its 9.45-inch overall length and compact profile fit tight engine bays where standard fittings would interfere with accessories or create awkward tubing runs. Welding or brazing this elbow into your system requires standard automotive fabrication techniques; ensure proper alignment before joining to maximize flow benefits and system longevity.